Abstract

The effect of different acids on the scale removal from heat exchanger are investigated in this study. Different concentrations of the acids are studied resulting higher the concentration of acids higher the removal of the scale. The inhibition effect of different concentration the hexamine and glutamine are studied with weight loss method. The results show that inhibition efficiency increases by increasing the concentration of the inhibitors. Time of dissolution plays an important role in the efficiency of the acid and the inhibitors, higher the time of dissolution higher will be the efficiency. Theoretical calculations result 2.5 M HCl solution with 0.80 grams of glutamine at 2.5 hr time gives the best results of removal of scale. Comparison on the basis of temperature is also done in this study, higher the temperature of the acid the greater the dissolution rate of the scale.